There is one servo for rudder, 2 for elevator's, all are located where the plans specify. One thing I did was up in the front, instead of permenantly attaching the forward deck (where the canopy glues to) I converted it into a hatch, in case I ever needed to get in there, I also added bracing around the landing gear plate, these have a tendency to be extremly weak. I also got the fiberglass cowl and pants from fiberglass specialities, tried the abs cowl that was supplied but man that would have been alot of work. Good flying plane.....